TY - JOUR
T1 - Determination of Carbon Content in Steels Using Laser-Induced Breakdown Spectroscopy Assisted with Laser-Induced Radical Fluorescence
AU - Li, Jiaming
AU - Zhu, Zhihao
AU - Zhou, Ran
AU - Zhao, Nan
AU - Yi, Rongxing
AU - Yang, Xinyan
AU - Li, Xiangyou
AU - Guo, Lianbo
AU - Zeng, Xiaoyan
AU - Lu, Yongfeng
N1 - Funding Information:
The authors acknowlege National Instrumentation Program of China (Grant No. 2011YQ160017) and National Natural Science Foundation of China (Grant No. 61575073) for funding.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - Carbon is a key element for steel properties but hard to be determined by laser-induced breakdown spectroscopy (LIBS). Utilizing the combination of carbon in analytes and nitrogen in ambient gas to generate carbon-nitrogen (CN) radicals, LIBS assisted with laser-induced radical fluorescence (LIBS-LIRF) was proposed to resonantly excite radicals instead of atoms in plasmas. The CN radicals in the B2Σ-A2Π band were stimulated by a 421.60 nm laser wavelength and emitted 388.34 nm fluorescence. The results show that the spectral intensity of the CN radicals was enhanced by 2 orders of magnitude using LIBS-LIRF. Then carbon content in steels was accurately and sensitively determined without spectral interference. The limits of detection (LoDs) were 0.039 and 0.013 wt % in air and nitrogen gas, respectively. The limits of quantification (LoQs) were 0.130 and 0.043 wt % in air and nitrogen gas, respectively. This work demonstrated the feasibility of LIBS to realize reliable carbon determination in steel industry.
AB - Carbon is a key element for steel properties but hard to be determined by laser-induced breakdown spectroscopy (LIBS). Utilizing the combination of carbon in analytes and nitrogen in ambient gas to generate carbon-nitrogen (CN) radicals, LIBS assisted with laser-induced radical fluorescence (LIBS-LIRF) was proposed to resonantly excite radicals instead of atoms in plasmas. The CN radicals in the B2Σ-A2Π band were stimulated by a 421.60 nm laser wavelength and emitted 388.34 nm fluorescence. The results show that the spectral intensity of the CN radicals was enhanced by 2 orders of magnitude using LIBS-LIRF. Then carbon content in steels was accurately and sensitively determined without spectral interference. The limits of detection (LoDs) were 0.039 and 0.013 wt % in air and nitrogen gas, respectively. The limits of quantification (LoQs) were 0.130 and 0.043 wt % in air and nitrogen gas, respectively. This work demonstrated the feasibility of LIBS to realize reliable carbon determination in steel industry.
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U2 - 10.1021/acs.analchem.7b01932
DO - 10.1021/acs.analchem.7b01932
M3 - Article
C2 - 28669178
AN - SCOPUS:85026681207
VL - 89
SP - 8134
EP - 8139
JO - Analytical Chemistry
JF - Analytical Chemistry
SN - 0003-2700
IS - 15
ER -